/tmp/makepkg/python-leidenalg/src/leidenalg-0.9.0/vendor/source/igraph/src/io/graphml.c: In function ‘igraph_read_graph_graphml’:
/tmp/makepkg/python-leidenalg/src/leidenalg-0.9.0/vendor/source/igraph/src/io/graphml.c:1614:39: error: passing argument 2 of ‘xmlSetStructuredErrorFunc’ from incompatible pointer type [-Wincompatible-pointer-types]
 1614 |     xmlSetStructuredErrorFunc(&state, &igraph_i_libxml_structured_error_handler);
      |                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                       |
      |                                       void (*)(void *, xmlError *) {aka void (*)(void *, struct _xmlError *)}
In file included from /usr/include/libxml2/libxml/valid.h:16,
                 from /usr/include/libxml2/libxml/parser.h:20,
                 from /usr/include/libxml2/libxml/HTMLparser.h:16,
                 from /usr/include/libxml2/libxml/globals.h:18,
                 from /tmp/makepkg/python-leidenalg/src/leidenalg-0.9.0/vendor/source/igraph/src/io/graphml.c:44:
/usr/include/libxml2/libxml/xmlerror.h:905:57: note: expected ‘xmlStructuredErrorFunc’ {aka ‘void (*)(void *, const struct _xmlError *)’} but argument is of type ‘void (*)(void *, xmlError *)’ {aka ‘void (*)(void *, struct _xmlError *)’}
  905 |                                  xmlStructuredErrorFunc handler);
      |                                  ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
/tmp/makepkg/python-leidenalg/src/leidenalg-0.9.0/vendor/source/igraph/src/io/graphml.c:1534:13: note: ‘igraph_i_libxml_structured_error_handler’ declared here
 1534 | static void igraph_i_libxml_structured_error_handler(void* ctx, xmlErrorPtr error) {
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/libxml2/libxml/xmlerror.h:871:16: note: ‘xmlStructuredErrorFunc’ declared here
  871 | typedef void (*xmlStructuredErrorFunc) (void *userData, const xmlError *error);
      |                ^~~~~~~~~~~~~~~~~~~~~~
[ 87%] Building C object src/CMakeFiles/igraph.dir/io/parsers/dl-parser.c.o
At top level:
cc1: note: unrecognized command-line option ‘-Wno-unknown-warning-option’ may have been intended to silence earlier diagnostics
make[2]: *** [src/CMakeFiles/igraph.dir/build.make:1927: src/CMakeFiles/igraph.dir/io/graphml.c.o] Error 1
make[2]: *** Attesa per i processi non terminati....
[ 87%] Building C object src/CMakeFiles/igraph.dir/io/parsers/gml-lexer.c.o
[ 87%] Building C object src/CMakeFiles/igraph.dir/io/parsers/gml-parser.c.o
make[1]: *** [CMakeFiles/Makefile2:834: src/CMakeFiles/igraph.dir/all] Error 2
make: *** [Makefile:156: all] Error 2
Build failed for the C core of igraph.


ERROR Backend subprocess exited when trying to invoke build_wheel